Minor sin or petty fault (10)

I believe the answer is:

peccadillo

(Other definitions for peccadillo that I've seen before include "foible" , "Slip" , "minor misdemeanour" , "Minor offence" , "Little fault" .)

I've seen this clue in The Mirror.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.